Which kingdom supplied Blücher's army at Waterloo?

Which kingdom supplied Blücher’s army at Waterloo? Prussia.

Prussia supplied the army commanded by Field Marshal Gebhard Leberecht von Blücher at Waterloo. More precisely, Blücher led the Prussian Army, one of the two major Seventh Coalition forces confronting Napoleon on 18 June 1815. The other was Wellington’s Anglo-allied army, which included British, Dutch, Belgian, Hanoverian, Brunswick and Nassau troops.

Napoleon had tried to defeat the coalition armies separately. On 16 June, he fought the Prussians at Ligny and forced them to retreat, but the army remained capable of fighting. Blücher promised Wellington support, and Prussian corps marched toward the battlefield on 18 June despite difficult conditions and the earlier defeat.

Their arrival on the French right flank, especially around Plancenoit, placed increasing pressure on Napoleon’s army. French troops had to divert substantial forces to face the Prussian advance, weakening the attacks against Wellington. That cooperation helped produce the coalition victory and Napoleon’s final defeat.